PIN Locations

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Mar 25, 2010 | 03:07 PM

jimish

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From: Yonkers New York

PIN Locations

I need to locate pins 31 and 71 on the blue plug to the ECM. The computer has A,B,C and D, with arrows to each plug, but no numerical markings.

Mar 25, 2010 | 03:23 PM

lucky131969

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From: Dyer, IN

Quote:

Originally Posted by jimish

I need to locate pins 31 and 71 on the blue plug to the ECM. The computer has A,B,C and D, with arrows to each plug, but no numerical markings.

I'm assuming for an 02?......not used.

Last edited by lucky131969; Mar 25, 2010 at 03:33 PM.

Mar 25, 2010 | 03:56 PM

jimish

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From: Yonkers New York

Exactly what I needed. Thank you so much. I understand by grounding pin 31 the trans goes into manual mode, and 71 will put it into the second programming mode (4 wheel drive)

Mar 25, 2010 | 04:12 PM

dougbfresh

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Quote:

Originally Posted by jimish

Exactly what I needed. Thank you so much. I understand by grounding pin 31 the trans goes into manual mode, and 71 will put it into the second programming mode (4 wheel drive)

How can they do anything if they are not used?

Mar 25, 2010 | 05:46 PM

lucky131969

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From: Dyer, IN

Quote:

Originally Posted by jimish

Exactly what I needed. Thank you so much. I understand by grounding pin 31 the trans goes into manual mode, and 71 will put it into the second programming mode (4 wheel drive)

Well that's interesting. On what GM model is that used?

Mar 25, 2010 | 07:36 PM

jimish

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From: Yonkers New York

The EFI Live program calls the second program,4 wheel drive the performance program and says to momentarily connect to ground to use whatever you have programmed in. Likewise it says to use a second switch and momentarily connect to ground to go into manual mode.